The Equation for the Period T of a Mass M

Multiple Choice

The equation for the period T of a mass m oscillating with simple harmonic motion at the end of a spring with a force constant k is .A mass m that is oscillating on a spring with a force constant of 0.52 N/m has a period of 2.1 s.On a second spring,the same mass has a period of 3.5 s.The force constant of the second spring is

A) impossible to determine because the mass is not given.
B) 0.19 N/m
C) 1.4 N/m
D) 0.31 N/m
E) 0.75 N/m